There is way more to it than that. That was a very convenient pretext for China to legitimise its unofficial exports ban. It reduced the number of exporters to single digits per provice, and even few ones with appropriate licenses are now being turn arond at customs without explanations.
China's official Red Cross, however, seems to have zero problem exporting just anything off the shelf.
Even supplies for which there simply can't be a medical certification are stalling at customs. I know a person who works in medical clothing industry, and they ran into that with... hospital bedsheets.
As of now, the lion share of PPE coming from China is effectively being smuggled out.